Issue 34, 2024

Unity fluorescent carbene–gold(i)–acetylide complexes with two-photon absorption and energy-efficient blue FOLEDs

Abstract

Two fluorescent organometallic “carbene–gold(I)–acetylide” (CMAc) complexes based on bicyclic alkyl(amino) carbene (BIC), 4-ethynyl-2,1,3-benzothiadiazole (Au1) and 4,7-diethynyl-2,1,3-benzothiadiazole (Au2) have been synthesized and characterized. Compounds Au1 and Au2 exhibit blue to yellow fluorescence with up to unity fluorescence quantum yields and radiative rates exceeding 108 s−1. The dipolar Au1 complex exhibits a low two photon absorption cross-section (2PA σ2) of 0.8 GM, whereas the quadrupolar Au2 complex shows a high 2PA σ2 value of 90 GM. A fluorescent CMAc organic light emitting diode (OLED) emits blue electroluminescence with up to 4.7% external quantum efficiency.

Graphical abstract: Unity fluorescent carbene–gold(i)–acetylide complexes with two-photon absorption and energy-efficient blue FOLEDs

Supplementary files

Article information

Article type
Paper
Submitted
04 Maw 2024
Accepted
18 Maw 2024
First published
19 Maw 2024

J. Mater. Chem. C, 2024,12, 13545-13554

Unity fluorescent carbene–gold(I)–acetylide complexes with two-photon absorption and energy-efficient blue FOLEDs

A. C. Brannan, H. Cho, J. Daniel, A. J. Harvey, C. T. Smith, N. Le Phuoc, M. Linnolahti, M. Blanchard-Desce, N. C. Greenham and A. S. Romanov, J. Mater. Chem. C, 2024, 12, 13545 DOI: 10.1039/D4TC02845G

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